Overview Reviews Product Description Belimo Shaft extension for 1/2" diameter shafts (3.8" L). Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Belimo Belimo ZG-NMSA-1 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments